Sewing-machine.



J. VANNb'l'l'ti.

SEWING MACHINE.

APPLICATION rum) AUG.2,1D10.

Patented May 12, 1914.

2 SHEETS-SHEET 1.

IIVVENTOR efas ver Wm his ATTORNEY WITNESSES:

COLUMBIA PLANOGRAPII co wAsumuroN. u. c.

B T T E N N A V J SEWING MACHINE.

APPLICATION FILED AUG. 2, 1910.

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Patented May 12 w A w his ATTORNEY JASPER VANNETTE, OF TIFFIN, OHIO, ASSIGNOR TO VANNETTE BOBBINLESS SEWING MACHINE COMPANY, OF AMSTERDAM, NEW YORK.

SEWING-MACHINE.

To all whom it may concern Be it known that I, JASPER V ANNE'LTJ-l, citizen of the United States, and resident of 'lillin, in the county of Seneca and. State of Ohio, have invented certain new and useful Improvements in Sewing Machines, of which the following is a specification.

In the usual operation of a sewing machine, the machine is stopped at the end of a sewing operation, after which the operator lifts the presser from engagement with the work by means of a suitable hand-lever to permit of the workbeing readily removed from. thereunder. Preliminary to again starting the machine and after the work has been placed in proper position on the bedplate to be acted on by the sewing mechanism, the operator again lowers the prcsser into engagement with the work by a proper manipulation of its lifting lever. To avoid this operating of the presser by the operator prior and subsequent to each sewing operation and render the same automatic has been one of the main objects of my invention.

To this end the invention consists in providing means adapted to be operated from the driving shaft of the machine for lifting the presser from the work upon the stopping of the machine at the end of the sewing operation, and automatically releasing said presser to permit. it to lower into engagement with the work upon the subsequent. starting of the machine; this presser lifting and releasing means preferably embodying a controller device by which it may be controllable by the operator during the sewing operation to render it operative or inoperative.

Another and important object of my invention is to effect stopping of the machine with the presser in lifted position and with the take-up in its raised or stitch-tightening position; this position of the take-up permit ting of the thread being cut close to the needle without liability of its unthreading therefrom upon the subsequent starting of the machine, as will be obvious to those skilled in the art. In carrying this object of my invention into effect, I time the action of the said presser-lifting means to have the presser in lifted position. at a time when the take-up is in its raised or stitch-tightening position, and provide means for automatically stopping the machine at such time; the

said stopping means preferably being asso- Patented May 12, 1914..

1910. Serial No. 575,130.

ciated with the prcsser-lifting means to be controllable therewith.

These and other ileatures of the invention not hereinbefore referred to will be hereinafter described and claimed and are illustrated in the accompanying drawings, in wlnch,

Figure l is a front elevation of the forward or needlebar supporting end of a sewing machine arm having my invention applied thereto, showing the presser-lifting means in inoperative position and the presser lowered. Fig. 2 is a similar view showing the prcsser-lifting means in operative position and the prcsser lifted, and also showing the arm partly broken away to disclose the takc-up and its operating cam. Figs. 3 and et are front end elevations of the sewing machine arm with theparts in positions corresponding to those of Figs. 1 and 2 respectively, and with the face-plate and arm in Fig. :5 partly broken away to show the connection between the presser and its lifting means. Fig. .7 1s a rear elevation of the arm with the parts in positions corresptmding to tlnse of Fig. l. Fig. (1 is a central vertical section of the same, also with the parts in positions corresponding to those of Fig. 1. Fig. 7 is an enlarged detail, partly broken away, of the presscr lifting and machine stopping means in operative position. Fig. 8 is a side view of the same, partly in section on the line S--8 of Fig. 7. Fig. 9 is a front end elevation of the operating crank at the front end of the driving shaft.

Similar reference characters designate like parts in the several figures of the drawings. In these drawings, I have shown only so much of a sewing machine as is necessary to illustrate my invention, which may be applied to most. any of the ordinary types of sewing machines now on the market. That portion of the machine shown comprises the front end of the overhanging bracket arm with the needle-thread controlling parts usually supported thereon. The arm or frame is indicated at 2, and supported by it is the driving shaft 3, having at its front end a crank -l and grooved cam 5; the vertically reciprocating ncedlebar (3 operated from said crank 4t through the connecting pitman 7; the t'tllitdtl) 8 in the form of a. pivoted bell-crank lever operated from said cam 5; the vertically movable presser t) yieldingly held in a normal lowered position by a TE s'ratrnsrarnnr moon.

spring 10 acting against a collar 11 thereon; and the pivoted presser-lifting hand-lever 12 adapted to co-act with a laterally projecting pin or stud 18 on the collar 11 of the presser. All of these parts, in so far as described, are of usual construction and operation.

I will now describe my improved presserlifting means. This means, in the form here shown, comprises a vertically movable slideplate 14 held to the arm of the machine by a headed screw 15 extending through a vertical elongated opening 16 therein, and having connection at its lower end with the presser by means of the presser pin 13 entering an opening 17 therein. Projecting from one side of this slide-plate is an arm 18 carrying in position at the front of the machine arm a fulcrum pin or extension 19 on which is pivoted a controller-latch 20 adapted to be moved to and from an operative position for engagement with an actuator, here shown in the form of a rotary cam 21, by which the slide-plate and connected presser may be caused to be lifted. The actuator cam 21. may be operated from the driving shaft 3 inany suitable or convenient man ner. In the present case, as most clearly shown in Fig. 6, it is attached to the front end of a shaft 22 which is journaled in the face-plate 2 eccentric to the driving shaft 3 and provided at its rear end with a crankarm 23 having a pin 2% extending into a radial groove 4 of the driving shaft crank 4t to be operated from the latter to impart rotary movement to the shaft 22 and its cam 21.. In the present case the needle-bar pitman 7 also connects with said crank pin 24- to be operated thereby from the crank 4. The actuator cam 21 being operated from the driving shaft 3 in the manner described, has a continuously revolving movement during the operation of the machine. The presser, however, ordinarily is to be lifted only at the end of each sewing operation. For such reason the controller-latch 20 is normally held during the sewing operation, as by means of the engaging spring-pressed pin 25, in inoperative position away from engagement with the cam 21, as shown in Figs. 1, 3, 5, and 6, whereby the presser will remain in its lowered operative position in engagement with the work. At the end of a sewing operation, however, and as the machine is slowed down preparatory to stopping the same, the operator may press the controllerlatch inwardly to bring its edge 26 into the ath of movement of the cam 21, whereupon the latter will engage therewith and lift the same and the connected presser, as shown in Figs. 2 and f; the latch being guided and held against lateral thrust between two guides 20, 20, when so acted on by said cam.

The lifting of the presser to its highest point, as hereinbefore stated, is effected at a .at such time very slowly and quite within the control of the operator preparatory to stopping the same. When the machine is again started for another sewing operation, the cam 21 moves from the notch or detent 27 which has its wall inclined to readily permit of such movement-and permits the presser to lower under the action of its spring 10 until it comes in contact with the work, at which time its downward movement and that of the controller-latch is stopped. Thereupon, the cam in its continued rotation moves from its engagement with the controller-latch and permits the latter to be returned under the action of the springpressed pin 25 to its normal inoperative position away from the path of movement of the cam 21, as shown in Figs. 1, 3, 5, and 6, in which position it remains during the sewing operation and until again moved or pressed into operative position by the operator.

In order that the operator may not be required to hold the controller-latch in opertive relation to the cam 21 against the pressure of the spring-pressed pin 25 subsequent to the initial engagement of said parts, the end of the cam 21 is beveled, as clearly shown at 29 in Fig. 8, for engaging a like beveled edge of the latch, whereby a locking connection between said parts will be effected during the time they are in cooperative relation.

It sometimes happens that the operator has occasion to lift the presser prior to the completion of a sewing operation, such for instance, as when turning a sharp corner in the work, and in order to permit this being done by the usual hand-lever 14 independent of the described automatic presser-lifting means, the opening 17 in the slide-plate 1& is made vertically elongated as shown, whereby the presser may be lifted by said lever 12 independentof said slide-plate and its associated parts.

Upon the completion of a sewing operation and preparatory to withdrawing the work from beneath the presser, it is desirable that the tension on the needle thread. should be released in order to permit the thread being readily drawn through the needle upon the withdrawal of the Work. To provide for this and render the tension release automatic upon the lifting of the presser, I pivot a tension-releaser or lever 31 to the faceplate or other support with one end. having operative connection with the slide-plate 14 by entering an opening 32 therein, and with its other end arranged to act upon the tension device 33 and effect a release of the thread when operated by the raising of the slide-plate let. The tension device here shown is of the ordinary disktension type, and the cooperating end of the lever 31 is adapted, when operated by the lifting of the slide-plate 14:, to engage the outer spring-pressed disk of said tension device and separate it sufficiently from the co-acting one, as shown in Fig. 9, to re lease the thread from tension thereby.

Having now illustrated and described one particular embodiment of my invention I do not wish to be understood as limiting myself to the specific construction, arrangement, and combination of parts so illust Med and described, as the same may be more or less materially modified without departure from the scope of my invention as pointed out in the following claims.

That I claim is 2- 1. In a sewing machine and in combination, the driving shaft having an actuating device at its front end, a rotary lifting cam operated from said device, a presser, and a lifting member operatively connected with said presser and being manually controllable for movement independent of the sewing mechanism to and from a position for engagement by said lifting cam.

2. In a sewing machine and in combination, the driving shaft having an actuating device at its front end, a rotary lifting cam operated from said device, a presser, and a lifting member operatively connected with said presser and being manually controllable for movement independent of the sewing mechanism to and from a position for engagement by said lifting cam, said lifting member also having means for cooperation with the lifting cam to effect stopping of the machine with the presser in lifted position.

In a sewing machine and in combination, the needle'bar, the driving shaft having a needle-bar operating crank at its front end, a lifting cam operated from said crank, a presser, and a lifting member operatively connected with said presser and being manually controllable for movement independent of the sewing mechanism to and from a. position for engagement by said lifting cam.

4-. In a sewing machine and in combination, the needle-bar, the driving shaft having a needle-bar operating crank at its front end, a lifting cam operated from said crank, a presser, and a lifting member operatively connected with said presser and being manually controllable for movement independent of the sewing mechanism to and from a position for engagement by said lifting cam, said lifting member also having means for cooperation with the lifting cam to effect stopping of the machine with both the needle-bar and presser in raised position.

In a sewin machine and in combination, a rotary lifting cam and actuating means therefor, a presser, a lifting member operatively connected with the presser and being movable to and from a position for engagement by said lifting cam, a spring normally holding the lifting member in inoperative position out of engagement with the lifting cam, and means for maintaining the lifting member in engagement with the lifting cam against the action of said sprin during a part of the rotation of the cam ant automatically releasing the same from engagement therewith after the restarting of the machine.

6. In a sewing machine and in combination, a rotary lifting cam and actuating means therefor, a presser, a lifting member operatively connected with the presser and being mounted for movement in a direction axially of the lifting cam to and from a position for engagement thereby, and a spring normally holding the lifting member in inoperative posit-ion out of engagement with the lifting cam, said lifting cam having a beveled or inclined surface for maintaining engagement of the lifting member therewith against the action of said spring during a part of the rotation of the cam after said member has been brought to position for en-v gagement by the cam.

Signed at Amsterdam, in the county of Montgomery and State of New York this 80th day of July, A. D. 1910.

J ASPER VANNETIE.

\Vitnesses:

IV. ARTHUR KLINE, ELIJAH DEAL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

